Inbound shipment costing - Route - multiple legs

Hi,

If I want to have shipment costing based on two legs in a route, one by sea and one by truck.

Do I need to creat two shipments for this or can I process the costs in one shipment and one shipment costing records?

I have everything working but when I do the goods receipt the freight/transport costs are not determined and there is not accounting document created for the freight element.

Regards